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You searched for: Subject fish Remove constraint Subject: fish Subject term dimorphism Remove constraint Subject term: dimorphism
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1. Assessing the potential of improving growth and survival to the eyed stage in selectively bred Arctic charr (Salvelinus alpinus)

Author:
Christos Palaiokostas; Henrik Jeuthe; Dirk‐Jan De Koning
Source:
Journal of animal breeding and genetics 2021 v.138 no.3 pp. 326-337
ISSN:
0931-2668
Subject:
Salvelinus alpinus; body weight; dimorphism; fish; genotype-environment interaction; heritability; prediction; Sweden
Abstract:
... The Arctic charr breeding programme has been a main driving force for developing the aquaculture industry in Sweden. Selection has been performed for almost 40 years using animals from a closed breeding nucleus. The aim of the current study was to evaluate the potential of further improving growth‐related traits taking into account the existence of genotype‐by‐environment interaction. Furthermore, ...
DOI:
10.1111/jbg.12509

2. Breeding of YY super-male of blotched snakehead (Channa maculata) and production of all-male hybrid (Channa argus ♀ × C. maculata ♂)

Author:
Jian Zhao; Mi Ou; Yaping Wang; Haiyang Liu; Qing Luo; Xinping Zhu; Baixiang Chen; Kunci Chen
Source:
Aquaculture 2021 v.538 pp. 736450
ISSN:
0044-8486
Subject:
Channa argus; Channa maculata; aquaculture; artificial insemination; average daily gain; dimorphism; females; fish; genotype; growth performance; hybrids; industry; interspecific hybridization; males; prices; progeny; sex ratio; sex reversal; China
Abstract:
... Many commercially important fish species show significant sex dimorphism in growth and size. Breeding mono-sex stocks could improve economic benefits of farmers. The snakehead fish is massively cultured in China, over 0.5 million tons per year. The sex dimorphism of snakehead is remarkable, in which males are meanly twice in growth and size than females. Furtherly, the individual size of the marke ...
DOI:
10.1016/j.aquaculture.2021.736450

3. Comparative Transcriptome Analysis Revealed Genes Involved in Sexual and Polyploid Growth Dimorphisms in Loach (Misgurnus anguillicaudatus)

Author:
Li-Fei Luo; Zi-Sheng Xu; Eman Abdelwareth Baioumy Elsayed Elgazzar; Hang Du; Dan-Yang Li; Xiao-Yun Zhou; Ze-Xia Gao
Source:
Biology 2021 v.10 no.9 pp. -
ISSN:
2079-7737
Subject:
Misgurnus anguillicaudatus; brain; dimorphism; diploidy; fatty acids; fish; gene expression regulation; gluconeogenesis; glycolysis; gonads; liver; muscles; oxidative phosphorylation; sequence analysis; steroid hormones; tetraploidy; transcriptomics
Abstract:
... Sexual and polyploidy size dimorphisms are widespread phenomena in fish, but the molecular mechanisms remain unclear. Loach (Misgurnus anguillicaudatus) displays both sexual and polyploid growth dimorphism phenomena, and are therefore ideal models to study these two phenomena. In this study, RNA-seq was used for the first time to explore the differentially expressed genes (DEGs) between both sexes ...
DOI:
10.3390/biology10090935

4. Contrasted hydrological systems of the Peruvian Amazon induce differences in growth patterns of the silver arowana, Osteoglossum bicirrhosum

Author:
Fabrice Duponchelle; Adela Ruiz Arce; Annelore Waty; Jacques Panfili; Jean-François Renno; Filomena Farfan; Aurea Garcia-Vasquez; Fred Chu Koo; Carmen Garcia Davila; Gladys Vargas; Almilcar Ortiz; Ricardo Pinedo; Jesus Nuñez
Source:
Aquatic living resources 2012 v.25 no.1 pp. 55-66
ISSN:
1765-2952
Subject:
Osteoglossum bicirrhosum; adults; dimorphism; fish; humans; juveniles; life history; longevity; otoliths; periodicity; phenotype; population structure; rivers; trade; yolk sac; Amazonia; Brazil
Abstract:
... In Amazonian fisheries, the silver arowana, Osteoglossum bicirrhosum (Cuvier 1829) is heavily exploited for human consumption as an adult, and for the aquarium trade as a small juvenile (yolk sac juvenile mainly). The periodicity of annuli formation on otoliths and growth variability of the silver arowana were studied in different river river-basins of the Peruvian Amazon between 2006 and 2009. Tr ...
DOI:
10.1051/alr/2012005

5. Contrasting growth strategies of pond versus marine populations of nine-spined stickleback (Pungitius pungitius): a combined effect of predation and competition?

Author:
Gábor Herczeg; Abigél Gonda; Anna Kuparinen; Juha Merilä
Source:
Evolutionary ecology 2012 v.26 no.1 pp. 109-122
ISSN:
0269-7653
Subject:
Pungitius pungitius; body size; correlation; dimorphism; fecundity; females; fish; intraspecific competition; males; marine environment; ponds; predation
Abstract:
... Gigantism in isolated ponds in the absence of sympatric fish species has previously been observed in nine-spined sticklebacks (Pungitius pungitius). Patterns in sexual size dimorphism suggested that fecundity selection acting on females might be responsible for the phenomenon. However, the growth strategy behind gigantism in pond sticklebacks has not been studied yet. Here, we compared von Bertala ...
DOI:
10.1007/s10682-011-9491-9

6. Development and characterization of polymorphic microsatellite markers in neotropical fish of the genus Apistogramma (Perciformes: Labroidei: Cichlidae)

Author:
S. Quérouil; A. Vela Diaz; C. García‐Dávila; U. Römer; J.‐F. Renno
Source:
Journal of applied ichthyology 2015 v.31 Suppl S4 no. pp. 52-56
ISSN:
0175-8659
Subject:
Apistogramma; DNA libraries; basins; conservation status; dimorphism; fish; genetic markers; heterozygosity; loci; mating behavior; microsatellite repeats; phylogeography; reproductive isolation; sympatric speciation; tropics; Amazonia
Abstract:
... The South American genus of Cichlid fish Apistogramma comprises over 100 species, most of which are difficult to identify. There is a need to clarify species limits and evolutionary relationships, conduct fine‐scale phylogeographic revision of some species complexes, and collect information on population conservation status. In addition, recent studies suggest that female mate choice may lead to r ...
DOI:
10.1111/jai.12975

7. Development and validation of sex-specific markers in Piaractus mesopotamicus

Author:
Florencia C. Mascali; Victoria M. Posner; Emanuel A. Romero Marano; Felipe del Pazo; Miguel Hermida; Sebastián Sánchez; Talita Sara Mazzoni; Paulino Martinez; Juan A. Rubiolo; G. Vanina Villanova
Source:
Aquaculture 2022 v.558 pp. 738374
ISSN:
0044-8486
Subject:
Neotropics; Piaractus mesopotamicus; aquaculture; cost effectiveness; dimorphism; fish; freshwater; genome; genome-wide association study; genomics; indigenous species; males; sex determination
Abstract:
... The development of genetic markers for genomic screening is essential for addressing more accurate breeding programs in aquaculture and to ascertain the genetic architecture of productive traits, particularly the mechanisms underlying sex determination in fish. Sex determination systems display huge variation in fish, ranging from those strictly determined by genetic factors to others influenced b ...
DOI:
10.1016/j.aquaculture.2022.738374

8. Effects of Estradiol and Testosterone on the Expression of Growth‐related Genes in Female and Male Nile Tilapia, Oreochromis niloticus

Author:
Mengmeng Yue; Jinliang Zhao; Shoujie Tang; Yan Zhao
Source:
Journal of the World Aquaculture Society 2018 v.49 no.1 pp. 216-228
ISSN:
0893-8849
Subject:
Oreochromis niloticus; blood serum; dimorphism; estradiol; females; fish; genes; growth performance; males; muscles; somatomedins; somatotropin; steroid hormones; testosterone
Abstract:
... Nile tilapia exhibits strong sexual growth dimorphism. The potential role of sex steroid hormones in sexual growth dimorphism is not fully understood. We investigated the effects of estradiol (E₂) and testosterone (T) on growth rate, plasma sex hormones, and expression of growth hormone (GH)‐insulin‐like growth factor (IGF) axis genes and muscle regulatory factor (MRF) genes in female and male Nil ...
DOI:
10.1111/jwas.12428

9. Evolution of mating systems and sexual size dimorphism in North American cyprinids

Author:
M. Pyron; T. E. Pitcher; S. J. Jacquemin
Source:
Behavioral ecology and sociobiology 2013 v.67 no.5 pp. 747-756
ISSN:
0340-5443
Subject:
Cyprinidae; body size; dimorphism; females; fish; males; mating systems; models; phylogeny; spawning; sperm competition; testes
Abstract:
... Mating systems evolve with sexual size dimorphism (SSD) in many animals. Mating systems with males larger than females occur when males compete for female access or guard territories, while mating systems with group mating tend to occur in species where females are the same size or larger than males. In addition to variation in SSD with mating system, sperm competition varies among mating systems ...
DOI:
10.1007/s00265-013-1498-5

10. Experimental evidence for sex-specific plasticity in adult brain

Author:
Gábor Herczeg; Abigél Gonda; Gergely Balázs; Kristina Noreikiene; Juha Merilä
Source:
Frontiers in zoology 2015 v.12 no.1 pp. 38
ISSN:
1742-9994
Subject:
Gasterosteus aculeatus; adulthood; adults; birds; brain; dimorphism; environmental enrichment; females; fish; fish behavior; males; mammals; neurogenesis; ontogeny; rearing
Abstract:
... BACKGROUND: Plasticity in brain size and the size of different brain regions during early ontogeny is known from many vertebrate taxa, but less is known about plasticity in the brains of adults. In contrast to mammals and birds, most parts of a fish’s brain continue to undergo neurogenesis throughout adulthood, making lifelong plasticity in brain size possible. We tested whether maturing adult thr ...
DOI:
10.1186/s12983-015-0130-0
PubMed:
26705404
PubMed Central:
PMC4690261

11. Genomic structure, polymorphism and expression analysis of the growth hormone (GH) gene in female and male Half-smooth tongue sole (Cynoglossus semilaevis)

Author:
Qian Ma; ShuFang Liu; ZhiMeng Zhuang; Lin Lin; ZhongZhi Sun; ChangLin Liu; Hui Ma; YongQuan Su; QiSheng Tang
Source:
Gene 2012 v.493 no.1 pp. 92-104
ISSN:
0378-1119
Subject:
fish; adults; polypeptides; microsatellite repeats; open reading frames; Cynoglossus semilaevis; males; rapid amplification of cDNA ends; gene expression; amino acids; genotype; signal peptide; gene expression regulation; introns; females; messenger RNA; dimorphism; complementary DNA; somatotropin; exons; gender differences; hatcheries; Yellow Sea
Abstract:
... Growth hormone (GH) is a polypeptide which is an important regulator of development and somatic growth in teleosts, and may be associated with the mechanisms which drive sexual growth dimorphism in the Half-smooth tongue sole (Cynoglossus semilaevis). In this study, the full length gh cDNA was cloned from C. semilaevis by homology cloning and the rapid amplification of cDNA ends polymerase chain r ...
DOI:
10.1016/j.gene.2011.11.015
PubMed:
22120536

12. Growth differences and dimorphic expression of growth hormone (GH) in female and male Cynoglossus semilaevis after male sexual maturation

Author:
Xiang-Shan Ji; Han-Wen Liu; Song-Lin Chen; Yun-Liang Jiang; Yong-Sheng Tian
Source:
Marine genomics 2011 v.4 no.1 pp. 9-16
ISSN:
1874-7787
Subject:
sexual maturity; messenger RNA; dimorphism; complementary DNA; somatotropin; body weight; Cynoglossus semilaevis; males; models; introns; reverse transcriptase polymerase chain reaction; gene expression; fish; exons; females
Abstract:
... Half-smooth tongue sole, Cynoglossus semilaevis, is an ideal model to investigate the regulatory mechanisms of sexual growth dimorphism in fish species. The aim of the study was to investigate the effect of differential age of sexual maturity for females and males on growth and GH mRNA expression in C. semilaevis. The body weight differences between the sexes were not significant in C. semilaevis ...
DOI:
10.1016/j.margen.2010.11.002
PubMed:
21429460

13. Hang on or run? Copepod mating versus predation risk in contrasting environments

Author:
Jersabek, Christian D.; Luger, Martin S.; Schabetsberger, Robert; Grill, Susanne; Strickler, J. Rudi
Source:
Oecologia 2007 v.153 no.3 pp. 761-773
ISSN:
0029-8549
Subject:
Copepoda; copulation; dimorphism; females; fish; lakes; males; natural selection; paternity; pigmentation; predation; risk; risk reduction; spermatophores; spermatozoa
Abstract:
... Mating durations of copepods were found to differ significantly between fishless high-altitude waters and lowland lakes containing fish. In lowland species the whole mating process was completed within a few minutes, but it averaged over an hour in high-altitude species. Alpine copepods showed a prolonged post-copulatory association between mates, during which the male clasped the female for an ex ...
DOI:
10.1007/s00442-007-0768-1
PubMed:
17541790

14. Histological evaluation of sex differentiation and early sex identification in hatchery-produced greater amberjack (Seriola dumerili) reared in sea cages

Author:
Maria Papadaki; Manolis Mandalakis; Thekla I. Anastasiou; Marina Pouli; Michalis Asderis; Pantelis Katharios; Nikos Papandroulakis; Constantinos C. Mylonas
Source:
Fish physiology and biochemistry 2021 v.47 no.6 pp. 1777-1792
ISSN:
0920-1742
Subject:
Seriola dumerili; androstenedione; captive animals; dimorphism; estradiol; fish; histology; liquid chromatography; progesterone; sex ratio; sexual development; tandem mass spectrometry; testosterone
Abstract:
... The histological process of gonadal differentiation, together with the endocrine changes of sex steroid hormones and some of their precursors, was studied in hatchery-produced greater amberjack Seriola dumerili from 101 until 408 days post-hatching (dph), with samplings conducted every 50 days. Histological processing showed that sex differentiation began at 101 dph with the formation of the ovari ...
DOI:
10.1007/s10695-021-01007-7

15. Identification of Male-Specific Molecular Markers by Recombination of RhoGEF10 Gene in Spotted Knifejaw (Oplegnathus punctatus)

Author:
Yanduo Wu; Yongshuang Xiao; Zhizhong Xiao; Yuting Ma; Haixia Zhao; Jun Li
Source:
Genes 2022 v.13 no.7 pp. -
ISSN:
2073-4425
Subject:
DNA; DNA fragmentation; Oplegnathus; Y chromosome; dimorphism; ecological value; females; fish; genes; genomics; males; myelin sheath; nerve tissue; nutritive value; rapid methods; sex determination
Abstract:
... The spotted knifejaw (Oplegnathus punctatus) is a marine economic fish with high ecological value, food value, and fishing value, and its growth has obvious sex dimorphism. The rapid identification of its sex is beneficial to the development of sex determination and breeding. In this study, the method of comparative genomics and PCR amplification was used to further establish a rapid detection met ...
DOI:
10.3390/genes13071262

16. Identification of a male-specific DNA marker in the large yellow croaker (Larimichthys crocea)

Author:
Aiqiang Lin; Shijun Xiao; Shuangbin Xu; Kun Ye; Xiaoyu Lin; Sha Sun; Zhiyong Wang
Source:
Aquaculture 2017 v.480 pp. 116-122
ISSN:
0044-8486
Subject:
dimorphism; males; breeding; polymerase chain reaction; biotechnology; Larimichthys crocea; sex determination; genetic markers; genotyping; fish; introns; females; agar gel electrophoresis; China
Abstract:
... Understanding sex determination mechanisms is the first and most paramount step in the development of sex control breeding biotechnologies for fish. The large yellow croaker (Larimichthys crocea) is an economically vital fish in China and East Asia, which exhibits a sex-related growth dimorphism where females grow significantly faster than males. However, the lack of a rapid and accurate sex speci ...
DOI:
10.1016/j.aquaculture.2017.08.009

17. Molecular cloning, expression analysis of insulin-like growth factor I (IGF-I) gene and IGF-I serum concentration in female and male Tongue sole (Cynoglossus semilaevis)

Author:
Qian Ma; Shu-Fang Liu; Zhi-Meng Zhuang; Zhong-Zhi Sun; Chang-Lin Liu; Yong-Quan Su; Qi-Sheng Tang
Source:
Comparative biochemistry and physiology 2011 v.160 no.4 pp. 208-214
ISSN:
1096-4959
Subject:
Cynoglossus semilaevis; adults; amino acids; blood serum; complementary DNA; dimorphism; enzyme-linked immunosorbent assay; females; fish; gender differences; gene expression; genes; insulin-like growth factor I; liver; males; messenger RNA; molecular cloning; open reading frames; polypeptides
Abstract:
... Insulin-like growth factor I (IGF-I) is a polypeptide hormone that regulates growth during all stages of development in vertebrates. To examine the mechanisms of the sexual growth dimorphism in the Tongue sole (Cynoglossus semilaevis), molecular cloning, expression analysis of IGF-I gene and IGF-I serum concentration analysis were performed. As a result, the IGF-I cDNA sequence is 911bp, which con ...
DOI:
10.1016/j.cbpb.2011.08.008

18. Morphological variation in the electric organ of the little skate (Leucoraja erinacea) and its possible role in communication during courtship

Author:
Jason M. Morson; John F. Morrissey
Source:
Environmental biology of fishes 2007 v.80 no.2-3 pp. 267-275
ISSN:
0378-1909
Subject:
Leucoraja erinacea; courtship; dimorphism; electric current; fish; predation; sensory system; surface area
Abstract:
... Skates discharge an electrical current too weak to be used for predation or defense, and too infrequent and irregular to be used for electrolocation. Additionally, skates possess a specialized sensory system that can detect electrical stimuli at the same strength at which they discharge their organs. These two factors are suggestive of a communicative role for the electric organ in skates, a role ...
DOI:
10.1007/s10641-007-9221-x

19. Morphological, distributional, and genetic characteristics of Cottus pollux in the Kyushu Island, Japan: indication of fluvial and amphidromous life histories within a single lineage

Author:
Kazuki Kanno; Norio Onikura; Yoshihisa Kurita; Akihiko Koyama; Jun Nakajima
Source:
Ichthyological research 2018 v.65 no.4 pp. 462-470
ISSN:
1341-8998
Subject:
Cottus pollux; dimorphism; environmental factors; fins; fish; freshwater; haplotypes; life history; mitochondria; mitochondrial DNA; phylogeny; ribosomal RNA; rivers; Japan
Abstract:
... We evaluated the morphological, distributional, and genetic characteristics of the freshwater sculpin, Cottus pollux, in Kyushu Island, Japan. Based on pectoral fin ray number, the sculpins inhabiting 30 rivers were divided into two types [modes 13 (M13) and 15 (M15)]. We evaluated four environmental parameters: length of main river (L-MR), average gradient of main river (G-MR), distance from samp ...
DOI:
10.1007/s10228-018-0637-4

20. Phenotypic variation of walleye, Sander vitreus, in Canadian Shield lakes: New insights on percid polymorphism

Author:
Yves Paradis; Pierre Magnan
Source:
Environmental biology of fishes 2005 v.73 no.4 pp. 357-366
ISSN:
0378-1909
Subject:
Canadian Shield; Sander vitreus; color; diet; dimorphism; fauna; fish; head; lakes; phenotype; phenotypic variation; sympatry; Lake Erie; Lake Ontario; Quebec
Abstract:
... SYNOPSIS: Literature on colour dimorphism in walleye has concerned only the blue form, Sander vitreus glaucum (formerly Stizostedion vitreum glaucum), historically found in lakes Erie and Ontario and considered to be extinct from the fish fauna since the 1960s. In this paper, we report unusual observations of a blue form of walleye living in sympatry with the yellow form, Sander vitreus (formerly ...
DOI:
10.1007/s10641-005-2261-1

21. Plumage Coloration in Belted Kingfishers (Megaceryle alcyon) At a Mercury-contaminated River

Author:
White Ariel E.; Cristol Daniel A.
Source:
Waterbirds 2014 v.37 no.2 pp. 144-152
ISSN:
1524-4695
Subject:
Alcedinidae; adults; color; diet; dimorphism; feathers; fish; gender differences; indicator species; melanin; mercury; monitoring; nesting; rivers
Abstract:
... Because Belted Kingfishers (Megaceryle alcyon) eat a diet comprised primarily of fish they are a useful indicator species for aquatic contaminants such as mercury. Monitoring efforts generally compare nesting success or tissue contaminant concentrations from contaminated sites with reference sites. In contrast, this study examined subtler potential effects of mercury accumulation by quantifying pl ...
DOI:
10.1675/063.037.0203

22. Polyculture of mixed-sex and male populations of Nile tilapia (Oreochromis niloticus) with the Mayan cichlid (Cichlasoma urophthalmus)

Author:
Martha Hernández; Eucario Gasca-Leyva; Ana Milstein
Source:
Aquaculture 2014 v.418-419 pp. 26-31
ISSN:
0044-8486
Subject:
Cichlasoma; Oreochromis niloticus; aeration; alkalinity; ammonium nitrogen; biomass; body weight; crude protein; diet; dimorphism; eggs; females; fiberglass; fish; intraspecific competition; introduced species; larvae; males; nitrites; pH; sexual maturity; tanks; temperature; water flow
Abstract:
... The purpose of this study was to test polyculture of Nile tilapia and the native Mayan cichlid, as an alternative production method of tilapia. The experiment had a 2×4 factorial design: the first factor was the population of tilapia (mixed-sex and 95% males) and the second factor was the proportion of Nile tilapia: Mayan cichlid (3:1, 5:1, 7:1 and 1:0). Proportion of 1:0 was tilapia monoculture. ...
DOI:
10.1016/j.aquaculture.2013.09.035

23. Residential form of white-spotted char Salvelinus leucomaenis inhabiting the warm stream discharging into Semlyachikskii Firth (Kronotskii natural reserve, Kamchatka)

Author:
E. V. Esin; Yu. V. Sorokin
Source:
Journal of ichthyology 2012 v.52 no.2 pp. 172-179
ISSN:
0032-9452
Subject:
Gammaridae; Salvelinus leucomaenis; autumn; body length; color; deformation; dimorphism; fish; foods; imagos; insects; larvae; otoliths; spawning; streams; summer; teeth; texture; water temperature
Abstract:
... Residential form of white-spotted char Salvelinus leucomaenis appears in volcanic stream characterized by stable water and temperature regime. The maximal body length of fish is 285 mm and body mass is 245 g; the oldest specimen is 7 years old. The somatic growth does not relax, and the annual growth rate is 30–40 mm. The maturation begins at the age of 4 years after the fish reaches 175 mm length ...
DOI:
10.1134/S003294521202004X

24. Sex bias miRNAs in Cynoglossus semilaevis could play a role in transgenerational inheritance

Author:
Na Zhao; Lei Jia; Xiaoxu He; Bo Zhang
Source:
Comparative biochemistry and physiology 2021 v.39 pp. 100853
ISSN:
1744-117X
Subject:
Cynoglossus semilaevis; dimorphism; epigenetics; fish; gametogenesis; males; microRNA; non-coding RNA; progeny; sexual development; spermatozoa
Abstract:
... Alterations of non-coding RNA profiling in spermatozoa are candidate mechanisms related to changes in paternal environment and progeny. Transgenerational inheritance of sex in pseudomales of Cynoglossus semilaevis, a fish with significant sex dimorphism, is a typical example of non-Mendelian inheritance. In the present study, miRNA profiles of spermatozoa were compared between male and pseudomale ...
DOI:
10.1016/j.cbd.2021.100853

25. Sexual size dimorphism predicts the frequency of multiple mating in the sex‐role reversed pipefish Syngnathus typhle

Author:
V. F. RISPOLI; A. B. WILSON
Source:
Journal of evolutionary biology 2008 v.21 no.1 pp. 30-38
ISSN:
1010-061X
Subject:
Syngnathus typhle; breeding season; cold; correlation; dimorphism; embryogenesis; fecundity; fish; latitude; males; microsatellite repeats; sexual selection; water temperature
Abstract:
... The sex‐role reversed pipefish Syngnathus typhle is a member of the Syngnathidae, a family of fishes in which males brood embryos on their body surface. As in most ectotherms, embryonic development is highly temperature dependent in syngnathids and male brooding periods are extended when water temperatures are reduced. The influence of temperature on reproduction is expected to effectively truncat ...
DOI:
10.1111/j.1420-9101.2007.01470.x
PubMed:
18034802

26. Small-scale variation in sexual size dimorphism and sex ratio in the aquatic moth Acentria ephemerella Denis and Schiffermüller, 1775 (Lepidoptera: Crambidae)

Author:
Oliver Miler; Elisabeth M. Gross; Dietmar Straile
Source:
Aquatic insects 2014 v.36 no.3-4 pp. 187-199
ISSN:
1744-4152
Subject:
Acentria ephemerella; Crambidae; Potamogeton; dimorphism; females; fish; herbivores; larvae; littoral zone; moths; population density; population size; predation; pupae; sex ratio; summer
Abstract:
... The aquatic herbivorous and capital-breeding moth Acentria ephemerella Denis and Schiffermüller, 1775 feeds on submerged pondweeds, Potamogeton spp., and is highly preyed upon by fish in the littoral zone. We studied the spatiotemporal within-lake variability of length, sexual size dimorphism (SSD) and sex ratio of A. ephemerella pupae and of larval population densities. Population densities at th ...
DOI:
10.1080/01650424.2015.1066015

27. Social Reversal of Sex‐Biased Aggression and Dominance in a Biparental Cichlid Fish (Julidochromis marlieri)

Author:
Kelsey J. Wood; Victoria H. Zero; Albyn Jones; Suzy C. P. Renn; W. Koenig
Source:
Ethology 2014 v.120 no.6 pp. 540-550
ISSN:
0179-1613
Subject:
Cichlidae; aggression; breeding; dimorphism; eggs; females; fish; gender differences; males; models; nests; progeny; social environment; territoriality
Abstract:
... In biparental species, aggression, dominance, and parental care are typically sexually dimorphic. While behavioral dimorphism is often strongly linked to gonadal sex, the environment—either social or ecological—may also influence sex‐biased behavior. In the biparental cichlid fish Julidochromis marlieri, the typical social environment for breeding pairs consists of large females paired with smalle ...
DOI:
10.1111/eth.12227

28. Spraguea lophii (Microsporidia) parasite of the teleost fish, Lophius piscatorius from Tunisian coasts: Evidence for an extensive chromosome length polymorphism

Author:
Lamjed Mansour; Oum Kalthoum Ben Hassine; Christian P. Vivares; Emmanuel Cornillot
Source:
Parasitology international 2013 v.62 no.1 pp. 66-74
ISSN:
1383-5769
Subject:
Lophius piscatorius; Microsporidia; chromosome number; chromosomes; coasts; dimorphism; fish; genes; karyotyping; parasites; parasitism; parasitology; pulsed-field gel electrophoresis; Tunisia
Abstract:
... A microsporidian of the genus Spraguea was found parasitizing the nervous tissues of Lophius piscatorius collected from various localities in the Mediterranean coastal areas of Tunisia. The tissue localization, the infection focus aspect and sporal dimorphism are characteristics of Spraguea lophii species. Molecular data based on partial sequence of SSUrRNA encoding gene shows few nucleotide polym ...
DOI:
10.1016/j.parint.2012.09.007

29. Temporal patterns and sex differences in dyadic interactions in a wild zebrafish population

Author:
Aditya Ghoshal; Danita K. Daniel; Anuradha Bhat
Source:
Behavioural processes 2019 v.166 pp. 103896
ISSN:
0376-6357
Subject:
Danio rerio; aggression; breeding; courtship; dimorphism; ecology; females; fish; gender differences; gravel; males; models; oviposition
Abstract:
... Male-female interactions in several group living organisms, including some fish species tend to be dynamic and play a key role in determining their mating and courtship behavior. Laboratory-bred zebrafish (Danio rerio) strains are one of the most widely used model systems in various fields of biology. While research on wild zebrafish behavior is gaining ground, our knowledge about their mating eco ...
DOI:
10.1016/j.beproc.2019.103896

30. Understanding how lake populations of arctic char are structured and function with special consideration of the potential effects of climate change: a multi-faceted approach

Author:
Phaedra Budy; Chris Luecke
Source:
Oecologia 2014 v.176 no.1 pp. 81-94
ISSN:
0029-8549
Subject:
Salvelinus alpinus; climate change; dimorphism; fish; growing season; lakes; latitude; population structure; reproductive performance; temperature; uncertainty
Abstract:
... Size dimorphism in fish populations, both its causes and consequences, has been an area of considerable focus; however, uncertainty remains whether size dimorphism is dynamic or stabilizing and about the role of exogenous factors. Here, we explored patterns among empirical vital rates, population structure, abundance and trend, and predicted the effects of climate change on populations of arctic c ...
DOI:
10.1007/s00442-014-2993-8
PubMed:
24969617

31. Why are reproductively parasitic fish males so small?—influence of tactic-specific selection

Author:
Ota, Kazutaka; Kohda, Masanori; Sato, Tetsu
Source:
Naturwissenschaften 2010 v.97 no.12 pp. 1113-1116
ISSN:
0028-1042
Subject:
allometry; dimorphism; fish; males; prediction; reproductive behavior; spawning
Abstract:
... Despite the wide prevalence of alternative reproductive tactics, little attention has been paid to why reproductively parasitic males are so small. In this study, we tackled this issue in a shell-brooding fish Lamprologus callipterus. Sneaky ‘dwarf males' of this fish remain much smaller than bourgeois conspecifics throughout their life and employ a unique parasitic tactic, i.e. entering into a ga ...
DOI:
10.1007/s00114-010-0725-4

32. The investigation of sex‐differential open chromatin in liver, spleen and gonads in Larimichthys crocea through ATAC‐seq

Author:
Chaowei Song; Zhiyong Wang; Wanbo Li
Source:
Aquaculture research 2022 v.53 no.10 pp. 3767-3779
ISSN:
1355-557X
Subject:
Larimichthys crocea; aquaculture; chromatin; dimorphism; epigenetics; females; fish; genes; landscapes; liver; males; phenotype; research; signal transduction; spleen; testes; transcription factors; transcriptome; transcriptomics
Abstract:
... Sex dimorphism is a fascinating science problem, which includes phenotypic, transcriptomic and epigenetic differences in male and female. To explore the landscape of transcriptome and its regulation in different sex in the large yellow croaker (Larimichthys crocea), we investigated the open chromatin using ATAC‐seq generated from livers, spleens and gonads in males and females. First, we found a m ...
DOI:
10.1111/are.15882

33. A new sexually dichromatic miniature Hyphessobrycon (Teleostei: Characiformes: Characidae) from the Rio Formiga, upper Rio Juruena basin, Mato Grosso, Brazil, with a review of sexual dichromatism in Characiformes

Author:
M. N. L. Pastana; F. C. P. Dagosta; A. L. H. Esguícero
Source:
Journal of fish biology 2017 v.91 no.5 pp. 1301-1318
ISSN:
0022-1112
Subject:
Hyphessobrycon; adults; basins; chromatophores; dimorphism; fins; fish; immatures; new species; Brazil
Abstract:
... Hyphessobrycon myrmex sp. nov., is described from the Rio Formiga, upper Rio Juruena, upper Rio Tapajós basin, Mato Grosso, Brazil. The new species can be distinguished from congeners by having the lower half of the body deeply pigmented with dark chromatophores, chromatophores concentrated above the anal fin and forming a broad, diffuse, dark midlateral stripe and by having a dense concentration ...
DOI:
10.1111/jfb.13449

34. A population genetic model for lateral dimorphism frequency in fishes

Author:
Mifuyu Nakajima; Hiroyuki Matsuda; Michio Hori
Source:
Population ecology 2005 v.47 no.2 pp. 83-90
ISSN:
1438-3896
Subject:
computer analysis; computer simulation; dimorphism; fish; genetic drift; mathematical models; omnivores; predation; predators
Abstract:
... Two morphological types, righty and lefty, are found in several fish species. Righty predators mainly prey on lefty prey and vice versa (called “cross predation”). This dimorphism is heritable in a Mendelian one-locus–two-allele fashion. The frequency of righty individuals in a population oscillates periodically. To determine the effect of cross predation on this oscillation, we constructed mathem ...
DOI:
10.1007/s10144-005-0210-7